Added alternate bases.
Added alternate bases.
deflaux/mvp_aaa_codelabs,deflaux/mvp_aaa_codelabs,deflaux/mvp_aaa_codelabs,StanfordBioinformatics/mvp_aaa_codelabs,deflaux/mvp_aaa_codelabs,StanfordBioinformatics/mvp_aaa_codelabs,StanfordBioinformatics/mvp_aaa_codelabs,StanfordBioinformatics/mvp_aaa_codelabs